Annealing furnace or leer



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WW.` O. MMSLIEIR ANNEALING FURNACE OR LEER Filed May 2l, 1920 2Sheets-Sham: 2

'WAliIER 1U.` SLER, 0F PTTSBURGH, PENNSYLW.

ANNELING JFURNAJCE UR MEER.

application inea nay ai,

To all whom it may concern:

Be it known that li, WALTER U. Arianne, a citizenof the United States,residing atr Pittsburgh, intheV county of Allegheny and ti State ofPennsylvania, have invented certain new and useful Improvements inAnnealing Furnaces or Leers, of which the following isa specification.

'llhe present invention relates to annealing i w furnaces or leers ofthe continuous type, and

particularly to glass leers in which a furnace of great length isemployed, as distinguishedfrom annealing furnaces having a short firebox or'heating chamber. lin' a companion application Serial No. 264,491,filed November 29, 1918, ll have shown and described an annealingfurnace of the type to which the present invention relates, and haveincorporated in this application many of thevfea.- 2@ tures shown inthesaid companion case.

`ftimong'the objects of my invent-ion are, to providea furnace and atunnel incommunication therewith of great length, in combination with aplurality of overhead in-` dependent combustion chambers; means forpassing products of combustion and heating gases into the tunnelstructure for the purpose o-f heating the entrance of the ytunnel andits forward endv for a considerable distance; means for passing theproducts of combustin, etc., into the .tunnel structure and returningthem to the chimney; and new and improved means for effecting a desire-dtemperature control throughout the length lof the annealing chamber andthe tunnel.

lfn the acompanying drawings, which illustrate an application of myinvention,l p Figs. 4land 2 arelongitudinal sectional views showingrespectively the annealing furnace construction and rthe tunnelconstruction embodying my invention;

lFig. 3, a horizontal sectional view showing one-half of the furnaceconstruction and one-half of a portion of the tunnel construction; and Alig. 4, a vertical sectional View taken on line 4-4 of lFig.` 1. AReferrin@r to the drawings, 2 designates the side wah-lis ofthe furnace,3 and 4 front and rear walls, and`5 the arched top. These A elements areof the usual briclrwork conchamber.

1920. Serial No. 3%;256.

struction, and are disposed on a suitable foundation 6. The furnaceillustrated is of the continuous type, and communicates at one endthrough an opening Z in the rear wall 4 with a tunnel 8.

lftwill be noted that ll employ a furnace of considerably more lengththan the usual and well known furnaces of the class to whlch myinvention relates, and that lf also provide a mutiie or an annealingchamber of great length, whereby li am enabled, in conjunction'with thecombination and arrangement of parts hereinafter described, to effect ahighly efficient temperature control, thereby making it possible for thematerial to titl' be treated under very favorable conditions. l

The mufiie or annealing chamber 9 has its side walls constructed oftiles 10 and blocks or tiles 11, its archy of tiles 12, and its bottomor floor :of tiles 13. Forming the side walls of `two ties, that is tosay, the side wall tile proper 10 and the skewtile or block 11, andresting the arch on the skew blocks, as shown, provides a highlysatisfactory construction, preventing cracks developing in the tiles,and preventing products o f combustion from entering the muffle. itsillustrated and as preferred, I employ two combustion chambers 14 and15, said chambers being located between the top of the annealing chamberand the under side 0f the roof of the furnace. 16 and 17 designatelaterally extendingpartition walls separating the combustion chambers,and 18 designates a. similar wall located adjacent the chimney 19., Asshown, lf provide two burner .structures 20 for each combustion ll findthat by "providing two` or more burners foreach combustion chamber, lfamenabled to better control the tem.- perature within the annealingchamber,

lfnterposed between 'the side walls of the annealing chamber and theside walls of the furnace, li provide a series of vertically eX- tendingHues 21 designed for passing products of combustion and gases from thelcombustion chambers down into fiues located under the, floor 13 of t-heannealing chamber. Similar flues are also provided for connecting thespace or compartment 22 disposed beyond the combustion chambers, thuspermitting the passage of gases from the flues and thence downwardlytherefrom into the .said flues located below the floor of the annealingchamber.

23 designates a. laterally extending partition wall disposed under theioor 13 and designed to cause the products of combustion and heatinggases to be passed upwardly from ,the said under flues to the chamber22. Y v

The side flues 21 are' provided with dampers 24 adapted to be operatedfrom the outside of the furnace. By means of these dampers, it will, ofcourse, be evident that I can control the passage of products ofcombustion through the side flues 21, and consequently, convenientlyregulate the temperature within the annealing chamber.

The construction and arrangement of the flues. below the floor 13 of theannealing chamber and the bottom or 'floor 13"1 of the furnace, whichflues connect with the side flues 21, vary somewhat, the arrangement andconstruction of the said flues being particularly shown by Fig. 3. Asshown therein, I provide a plurality of longitudinally extending 'flues25 extending from the front of the furnace to the ylaterally extendingpartition wall 23. Under the forward portion of the annealing chamber itis desirable to pass the products of combustion and heating gasesdirectly to,` the center ofthe bottom of the annealing chamber, and Ihave therefore provided laterally extendin flues 26, said fluesconnecting with the longltudinally extending flues 25.

Under the second combustion. chamber,

instead of passing the ases directly to the middle of the under si eofthe annealing chamber, the gases are passed laterally through shortflues 27 and then backwardly by means of the flues 28, the lattercommunicating with the longitudinal-ly extending flues 25.

The arrangement of the flues under the rear portion of chamber 22 issimilar to the lue construction under the first combustion chamber.FThat is to say, I employ laterally extending flues 29 whereby theheating gases are directed outwardlyinto longitudinally extending flues25. i

The longitudinally extending lines 25a extend beyond the chimney 19 andinto the front portion of the tunnel 8, and Afor this purpose, thelfloor 13 as well as floor or bottom 13*L is carried for a considerabledistance into the tunnel structure. By mean-s of the flue constructionjust described, I cause the heating gases to travel for a considerabledistance within the tunnel structure. Said gases travel under the to thechimney by means of flues or passages 31. While the longitudinallyextending flues 25' and 25a are separated by the'wall 23, they are ineffect tunnel up to the wall 30 and are then returned ber,longitudinally continuous flues for coveying the products of combustionand the heating gases back through the furnace and into the tunnel.

The ware or materials to be annealed are vpassed through the annealingchamber and the tunnel by means of a conveyor 32, said conveyor, asillustrated, being mounted on drive wheels 33 and 34 respectivelylocated Vat the end of the tunnel and atV the forward end of theannealing chamberor furnace.

35 designates a motor for driving the conveyor and as shown the motor isconnected with the drive wheel 33 by means of a drive chain 36.

While I have shown the chimney. located between the tunnel and thefurnace proper, it will be evident that the chimney may be otherwiselocated so long as means are provided for,passing the heating gases intoor under the tunnel, and conveying the said gases from the tunnelstructure to the chimney.

It will be understood that the products of combustion and the heatinggases, after their -travel under the annealing chamber will, owing tothe wall 23, be caused to pass upwardly into chamber or compartment 22,and from said chamber downwardly into the longitudinally extending fluesby which they are conveyed to the tunnel.

What I claim is:

1. In an annealing furnace or leer, an annealing chamber, a tunnel incommunication therewith, a combustion chamber at the exterior of theannealing chamber, a longitudinally extending vflue in communicationwith the combustion chamber and arranged to convey gases therefrom, saidflue extending along the forward end of the tunnel for heating lit.

2. In an annealing furnace or leer, an annealing chamber, a'tunnel incommunication from and extending along the forward end of the tunnel forconveying heating gases thereto.

In 'an annealing furnace or leer, an annealing chamber, a tunnel incommunication therewith, a combustion chamber, and flues incommunication with the combustion chamber, through passages at theexterior of the` annealing' chamber and extending along the outside ofthe tunnel for heating the forward end of the tunnel.

4. In an annealing furnace or leer, an annealing chamber, a combustionchamber located over the top of the annealing chamextending flues underthe annealing chamber, side flues about the exterior of the annealingchamber Aconnecting the combustion chamber with the longitudi- 1,11ea11enally extending dues, and a tunnel in communication with the annealingchamber, said longitudinally extending dues extending along a portion ofthe tunnel for heating it.

5. ln an annealing furnace or leer, an

annealing chamber, a tunnel in communication with the'annealing chamber,a chimney disposed between the annealing chamber and tunnel,longitudinally extending heating flues disposed below the annealingchamber and extending beyond the chimney and under the tunnel, and apassage at the side ofthe longitudinally extending flue communicatingwith the rear end thereof for conveying gases back to the chimney.

6. ln an annealing furnace or leer, an annealing chamber, a tunnel` incommunication with the annealing chamber, a chimney disposed between theannealing cham-y ber and tunnel, and longitudinally extending heatingflues disposed below the annealing chamber and extending beyond the-chimney and-into the tunnel structure and exteriorly of the tunnel,-said flues having connections with the chimney and arranged to producea flow of gases from the tunnel back to the chimney.

7. ln an annealing furnace or leer, an annealing chamber, a tunnel incommunication with the annealing chamber, a chimney disposed between theannealing chamber and the tunnel, a combustion chamber disposed over thetop of the annealing chamber, vertically extending side flues, andlongitudinally extending heating flues disposed below the annealingchamber and extending beyond the chimney and into the tunnel structure.,

8. lnan' annealing furnace or, leer of the continuous type, ank annealinchamber, a tunnel incommunication wit the annealing chamber, a chimneydisposed between the annealing chamber and tunnel, a pluralyity ofcombustion chambers disposed over the top of the annealing chamber,vertically extending side and longitudinally extending bottom heatingdues, said Vlongitudinally extending heating ,dues extending beyond thechimney and along the forwardl end of the tunnel.

9. An annealing furnace Vor leer comprising an annealing chamber, atunnel forming an extension of the annealing chamber, a combustionchamber at the exterior of the annealing chamber, flues surrounding theannealing chamber and communicating with the combustion chamber for"circulating side of the tunnel-for heating the forwardV end of thetunnel.

l0. An annealing furnace or leer comprising an annealing chamber, atunnel forming an extension of the annealing chamber, a combustionchamber at the" exterior of a portion of the annealing chamber,flues'communicating with the combustion chamber and arranged to pass theheated gases around the top, bottom and sides of the annealing chamber,said flues extending rearwardly under the forward end of the tunnel,whereby the forward portion of the tunnel is heated by the partiallycooled gases.

ll. An annealing furnace or leer comprising an annealing chamber, atunnel forming an extension of the annealing chamber, a combustionchamber at the exterior of the forward end of the annealing chamber, asecond combustion chamber at the exterior of the annealing chamber anddisposed rearwardly of the first combustion chamber, a main flue commonto both combustion chambers which communicates therewith through uespassing around the annealing chamber, said main flue being arranged tocirculate the heated gases of combustion around and under the remainingportion of `the annealing lchamber and extendin rearwardly outsideitheforward end of t e tunnel, whereby the forward end of the tunnel isheated by the partially cooled gases.

l2. An annealing furnace or leer comprising an annealingchamber, atunnel extending rearwardly from the annealing chamber, a combustionchamber at the top of the forward Iend of the annealing chamber and`will travel around the bottom, top and sides of the annealing chamberand under the forward end of the tunnel. i ln testimony whereof l affixmy signature 1n presence o two witnesses.

llitnesses d. M, GnoeHEeAN, liois Winni/ran.

